| /* |
| * Copyright (c) 2003, 2018, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package nsk.jvmti.ObjectFree; |
| |
| import java.io.*; |
| |
| import nsk.share.*; |
| import nsk.share.jvmti.*; |
| |
| /** |
| * This test exercises the JVMTI event <code>ObjectFree</code>. |
| * <br>It verifies that the the JVMTI raw monitor, memory management, |
| * and environment local storage functions can be used during processing |
| * this event.<p> |
| * The test works as follows. The special class <code>objfree001u</code> |
| * is loaded from directory <code>loadclass</code> by a custom class |
| * loader. Instance of <code>objfree001u</code> stored in field |
| * <code>unClsObj</code> is tagged by the agent via SetTag(). Then |
| * the class is tried to be unloaded. Received <code>ObjectFree</code> |
| * event is checked to have previously set tag. The JVMTI functions |
| * mentioned above should be invoked sucessfully during the event callback |
| * as well. If there are no ObjectFree events, the test passes with |
| * appropriate message. |
| */ |
| public class objfree001 { |
| /** |
| * number of dummy object created to provoke a tested instance |
| * to be GC'ed |
| */ |
| private final int OBJ_NUM = 10000; |
| |
| /** |
| * class signature to be loaded and then unloaded |
| */ |
| private final static String CLS_TO_BE_UNLOADED = |
| "nsk.jvmti.ObjectFree.objfree001u"; |
| |
| /** |
| * Object to be tagged in the agent part of the test |
| */ |
| Object unClsObj = null; |
| |
| private Log log; |
| |
| static { |
| try { |
| System.loadLibrary("objfree001"); |
| } catch (UnsatisfiedLinkError ule) { |
| System.err.println("Could not load \"objfree001\" library"); |
| System.err.println("java.library.path:" |
| + System.getProperty("java.library.path")); |
| throw ule; |
| } |
| } |
| |
| native void setTag(Object objToTag); |
| native void inform(boolean clsUnloaded); |
| |
| public static void main(String[] argv) { |
| argv = nsk.share.jvmti.JVMTITest.commonInit(argv); |
| |
| // produce JCK-like exit status |
| System.exit(run(argv, System.out) + Consts.JCK_STATUS_BASE); |
| } |
| |
| public static int run(String argv[], PrintStream out) { |
| return new objfree001().runThis(argv, out); |
| } |
| |
| private int runThis(String argv[], PrintStream out) { |
| ArgumentHandler argHandler = new ArgumentHandler(argv); |
| log = new Log(out, argHandler); |
| |
| String args[] = argHandler.getArguments(); |
| if (args.length <= 1) |
| throw new Failure("TEST BUG: path for class to be loaded and/or number of GC() calls\n" |
| + "\tis not specified"); |
| |
| String location = args[0]; |
| String clsDir = location + File.separator + "loadclass"; |
| |
| ClassUnloader clsUnLoader = new ClassUnloader(); |
| try { |
| int callNum = Integer.parseInt(args[1]); |
| |
| // load the class |
| log.display("\nTrying to load class from " |
| + clsDir + " ..."); |
| clsUnLoader.loadClass(CLS_TO_BE_UNLOADED, clsDir); |
| |
| Class unCls = clsUnLoader.getLoadedClass(); |
| log.display("Creating instance of \"" |
| + unCls + "\" ..."); |
| unClsObj = unCls.newInstance(); |
| log.display("Instance created: " + unClsObj.toString() |
| + "\n\tgetClass=" + unClsObj.getClass() + "\n"); |
| |
| // set tag for an instance of the class |
| setTag(unClsObj); |
| |
| // unload the class |
| log.display("Trying to unload \"" |
| + unCls + "\" ..."); |
| |
| Object obj[] = new Object[OBJ_NUM]; |
| for (int i=0; i<OBJ_NUM; i++) { |
| obj[i] = new Object(); |
| } |
| |
| unClsObj = null; |
| unCls = null; |
| for (int i=0; i<OBJ_NUM; i++) { |
| obj[i] = null; |
| } |
| boolean clsUnloaded = clsUnLoader.unloadClass(); |
| clsUnLoader = null; |
| |
| for (int i=0; i<callNum; i++) |
| System.gc(); |
| |
| log.display("Unloading of the class has" |
| + new String((clsUnloaded)? " ":" not ") |
| + "been detected" |
| + new String((clsUnloaded)? "!\n":"\n")); |
| |
| inform(clsUnloaded); |
| |
| return Consts.TEST_PASSED; |
| } catch(Exception e) { |
| e.printStackTrace(log.getOutStream()); |
| throw new Failure("TEST FAILURE: caught unexpected " |
| + e); |
| } |
| } |
| } |